This binder is the environmentally friendly option for your filing. Sturdy ad durable one piece board construction. Includes spine label holder for file identification. These deluxe binders are 3 ring. The 38mm holds approximately 300 sheets and the 65mm holds approximately 500 sheets. The dimensions for the portrait binders are 445x360x60mm and for the landscape binders 480x60x313mm. These binders are constructed from 100 percent recycled board and recyclable polypropylene. Purchasing each unit.